STRUCTURE OF SPLAT-QUENCHED CADMIUM-ZINC ALLOYS

Splat-quenched Cd-Zn alloys having less than ≃35 at % Zn and less than ≃15 at % Cd solidify without solute partitioning at the highest cooling rates that can be attained using a room-temperature substrate. Lower cooling rates yield fine-grained microduplex structures possibly resulting from interdendritic precipitation or from the independent nucleation and growth of the terminal Cd and Zn phases. A further reduction in the cooling rate gives a transition from microduplex to lamellar eutectic solidifcation in the eutectic (Cd-26.5 at % Zn) alloy. © 1979 Chapman and Hall Ltd.